Pages in this set

Page 1

Questions 6-11...........Magnification calculations
(NB scales may be different due to print size)

Questions 12-15.........Percentage Change

Questions 16-25.........Data analysis / general maths

Page 2

1. During the cardiac cycle, there are pressure changes in the left atrium, left ventricle and aorta.
The graph shows these pressure changes in the left atrium, left ventricle and aorta of a person.

(a) (i) Which time period corresponds with ventricular systole?
(1)
A 0.52 to 0.72
B 0.72…

Page 3

2. A student was interested to find out how his heart rate would vary throughout the day.
He wore a heart rate monitor from the time he woke up until the time he went to bed.
The graph shows the data collected and some of the student's activities during the…

Page 4

4. During the cardiac cycle, there are pressure changes in the left atrium, left ventricle and aorta.
The graph shows these pressure changes.

(a) (i) Which of the following statements is correct?
(1)
A the pressure in the left ventricle is always higher than in the aorta
B the highest…

Page 5

5. A student studied the external view of a mammalian heart, as shown in the diagram.

The student wanted to compare the size of the aorta and the vena cava of this heart.

She determined the cross-sectional area of the aorta, which was 72.22 mm2.
She also measured the diameter…

Page 6

6. In animals, sperm cells and egg cells are involved in sexual reproduction.
The photomicrographs show human sperm cells and a human egg cell. They are not shown to scale.

Using an eyepiece graticule (micrometer), the head of a human sperm cell was measured as 5 m in
length and…

Page 7

8. The photograph below shows cells dividing by mitosis.

(a) The actual length of cell J is 23.5 m.

(i) Calculate the magnification of this photograph.
(3)

Answer ...........................................................

9 The electronmicrograph below shows an image of a chloroplast.

(ii) The equation below can be used to calculate the magnification…

Page 8

10. A student investigated the effect of temperature on the heart rate of Daphnia.

(a) Use the lines A to B to calculate the actual length of this Daphnia.
(2)

Answer ...........................................................

(b) The student used five Daphnia in the investigation.
The Daphnia's heartbeats were counted over a 20-second period.…

Page 9

11.

Many animals reproduce sexually.

The diagram shows a healthy human sperm cell.

(ii) Which of the following is the approximate diameter of the sperm cell nucleus?
(1)
A 0.4 m
B 4 m
C 0.4 nm
D 4 nm

12 In some species of mammal, at fertilisation most of…

Page 10

13.

Carbohydrates are the body's main energy source.

The graph shows the change in concentration of blood glucose and muscle glycogen during exercise.

Calculate the percentage change in muscle glycogen during the three hours of exercise.
(2)